Download Chimera 3.2 - Docket Alarm

hirner 3.2
http://web.archive.org/web/20020927070327/http://vasc.ri.cmu.edulold_...
Chimera 3.2
A real-time operating system developed at CMU which isßr better than anything else you'lljmnd on
the market.
Table of Contents
Overview
Examples
Cool Stuff
Refe ren e e s
See Also
VASC Contact
Ilistory
Overview
The Chimera 3.2 Real-Time Operating System has its own HTML page which more than adequately
covers what it does, and how to use it. Let me therefore take this opportunity to answer the question,
"Why use Chimera instead of VxWorks?" (Besides the fact that it has a wonderful graphical interface
called Onika , I mean.)
Here's what Chimera inventor David B. Stewart has to say on the subject:
Frequently Asked Questions about Chimera vs. VxWorks
Q: What are the similarities and differences between the VxWorks and Chimera real-time kernels?
A: As with most other commercial real-time operating systems, VxWorks only provides a basic
real-time kernel which gives you task management, low-overhead context switching and local
semaphores, static highest priority first scheduling, and an interface to program the hardware timers
for periodic events.
Chimera provides an extended real-time kernel. h addition to all the basic functions that VxWorks
provides, it also gives you both static and dynamic real-time scheduling, virtual timers which eliminate
the need to explicitly program hardware timers, the novel deadline failure handling and global error
handling mechanisms, and two-level device driver support.
Q: Chimera claims it is a "multiprocessor operating system", while VxWorks only claims it has
"multiprocessor support". What is the difference?
A: VxWorks is only a single-processor operating system with multiprocessor extensions. Those
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